退出和加载我的应用程序时如何将图像保存并读取到我的临时文件夹

How do I save and read an image to my temp folder when quitting and loading my app(退出和加载我的应用程序时如何将图像保存并读取到我的临时文件夹)

问题描述

我想在我的应用程序关闭时将 UIImage 保存并读取到我的临时文件夹，然后在应用程序加载时加载并删除它.我该如何做到这一点.请帮忙.

I want to save and read a UIImage to my temp folder when my app closes and then load and delete it when the app loads. How do I accomplish this. Please help.

推荐答案

这些方法可以让你从iphone上的文档目录中保存和检索图像

These methods allow you to save and retrieve an image from the documents directory on the iphone

+ (void)saveImage:(UIImage *)image withName:(NSString *)name {
    NSData *data = UIImageJPEGRepresentation(image, 1.0);
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:name];
    [fileManager createFileAtPath:fullPath contents:data attributes:nil];
}

+ (UIImage *)loadImage:(NSString *)name {
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:name];    
    UIImage *img = [UIImage imageWithContentsOfFile:fullPath];

    return img;
}

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